Mobile phone back plate



FIG. 1 is a top right front perspective view of a mobile phone back plate showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged view of the encircled portion as shown in FIG. 1.

In FIGS. 1 and 8, the dot-dot-dash broken line encircles and indicates a portion of the claimed design shown on an enlarged scale in FIG. 8. The dash-dash broken lines depict unclaimed environment or portions of the mobile phone back plate. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a mobile phone back plate, as shown and described. 